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Course Outline
Application Tuning Methodology
Database and Instance Architecture
- Server process management
- Memory architecture (SGA, PGA)
- SQL parsing and shared cursors
- Data files, log files, and parameter files
Execution Plan Analysis
- Hypothetical plans (EXPLAIN PLAN, SQLPlus AutoTrace, XPlan)
- Actual execution plans (V$SQL_PLAN, XPlan, AWR)
Performance Monitoring and Bottleneck Identification
- Monitoring current instance status using system dictionary views
- Analyzing historical data via dictionary views
- Application tracking (SQLTrace, TkProf, TreSess)
Optimization Process
- Cost-based optimization properties and regulation
- Determining optimization strategies
Controlling the Cost-Based Optimizer via:
- Session and instance parameters
- Optimizer hints
- Query plan patterns
Statistics and Histograms
- The impact of statistics and histograms on performance
- Methods for collecting statistics and histograms
- Strategies for counting and estimating statistics
- Statistical management: blocking, copying, editing, automating collection, and monitoring changes
- Dynamic data sampling (temporary tables, complex predicates)
- Multi-column and expression-based statistics
- System statistics
Logical and Physical Database Structure
- Table spaces
- Segments
- Extensions (EXTENTS)
- Blocks
Data Storage Techniques
- Physical aspects of tables
- Temporary tables
- Index-organized tables
- External tables
- Table partitioning (range, list, hash, mixed)
- Physical reorganization of tables
Materialized Views and QUERY REWRITE Mechanisms
Data Indexing Methods
- Constructing B-Tree indexes
- Index properties
- Index types: unique, multi-column, function-based, inverted
- Index compression
- Index reconstruction and merging
- Virtual indexes
- Private and public synonyms for indexes
- Bitmap indexes and joins
Case Study: Full Data Scans
- The impact of table location and block level on read performance
- Conventional versus direct-path data loading
- The significance of predicate order
Case Study: Index-Based Data Access
- Index read methods (UNIQUE SCAN, RANGE SCAN, FULL SCAN, FAST FULL SCAN, MIN/MAX SCAN)
- Utilizing function-based indexes
- Index selectivity (Clustering Factor)
- Multi-column indexes and SKIP SCAN
- Handling NULL values and indexes
- Index-Organized Tables (IOT)
- Impact of indexes on DML operations
Case Study: Sorting Operations
- Memory-based sorting
- Index-assisted sorting
- Linguistic sorting
- The effect of entropy on sorting (Clustering Factor)
Case Study: Joins and Subqueries
- Join types: MERGE, HASH, NESTED LOOP
- Joins in OLTP and OLAP systems
- Join order optimization
- Outer Joins
- Anti-Joins
- Semi-Joins (incomplete joins)
- Simple subqueries
- Correlated subqueries
- Views and the WITH clause
Other Cost-Based Optimizer Operations
- Buffer Sort
- INLIST ITERATION
- View processing
- FILTER operations
- Count Stop Key
- Result Cache
Distributed Queries
- Reading query plans involving DB links
- Selecting the leading table
Parallel Processing
Requirements
- Proficiency in fundamental SQL concepts and a solid understanding of the Oracle database environment (completion of the 'Native SQL for Programmers' workshop with Oracle 11g is preferred)
- Hands-on practical experience working with Oracle databases
28 Hours
Testimonials (2)
1. I liked the trainer's style of presenting and the patience to explain. 2. I liked that the trainer answered our side questions, even the ones that took the discussion a bit farther from the presentation, which showed flexibility. 3. I liked that there was a practical lab, not just a theoretical part. 4. I liked that it was online.
Roxana - DB Global Technology
Course - Oracle 11g - Application Tuning - Workshop
Trainer expertise on SQL tuning
